Underground Maze.
Layers of space would occasionally cause phenomena, and just now, after a thunderstorm, the world that resembled the Abyss seemed even more desolate, the earth cracked, revealing white bones everywhere.
At this moment, a rat the size of a piglet was sucking the residual blood marrow from the skeletons.
This place used to be the [Four Fiends Labyrinth], harboring countless demons. Among them, the strongest would occupy a territory, create demon lairs, and specialize in capturing cultivators and ordinary people to absorb their flesh and blood essence for their cultivation of demonic laws.
However, time had passed, and those terrifying demon beasts had long been wiped out, and their demon lairs had perished as well.
If it wasn't for the recent thunderstorm, this long-lost demon lair might not have re-emerged.